<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
<h2>欢迎登录</h2>
<form action="/show" method="post">
    <input name="username" type="text" placeholder="请输入用户名.."><br/>
    <input name="password" type="password" placeholder="请输入密码.."><br/>
    <input type="submit" value="登录">
</form>
</body>
</html>
